The RCA 88-A is a pressure-actuated microphone ideally for general remote pickup use. A unique pivoting stand design and built in XLR connection made these great microphones for easy set up and efficiency. Bob Hope was often seen in photographs using this microphone. Owned and used by the famous Indigo Ranch Studios.
The Type 88-A Microphone is of the pressure-actuated type. The moving system consists of a thin molded diaphragm to which an annular coil assembly is attached. Coupled to the diaphragm is an acoustic circuit so proportioned that the diaphragm velocity will remain essentially constant for a constant sound pressure over the frequency range of 60–10,000 cycles. The coil is placed in the air gap of a magnetic structure and the ends connected to a transformer which provides output impedances of 50 or 250 ohms.